<template>
  <section class="main">
    <div class="crumbs">
      <el-breadcrumb separator="/">
        <el-breadcrumb-item><i class="el-icon-rank"></i> 拖拽组件</el-breadcrumb-item>
        <el-breadcrumb-item>拖拽排序</el-breadcrumb-item>
      </el-breadcrumb>
    </div>
    <div class="container">
      <div class="plugins-tips">
        Vue.Draggable：基于 Sortable.js 的 Vue 拖拽组件。
        访问地址：<a href="https://github.com/SortableJS/Vue.Draggable" target="_blank">Vue.Draggable</a>
      </div>
      <div class="drag-box">
        <div class="drag-box-item">
          <div class="item-title">todo</div>
          <draggable v-model="todo" @remove="removeHandle" :options="dragOptions">
            <transition-group tag="div" id="todo" class="item-ul">
              <div v-for="item in todo" class="drag-list" :key="item.id">
                {{item.content}}
              </div>
            </transition-group>
          </draggable>
        </div>
        <div class="drag-box-item">
          <div class="item-title">doing</div>
          <draggable v-model="doing" @remove="removeHandle" :options="dragOptions">
            <transition-group tag="div" id="doing" class="item-ul">
              <div v-for="item in doing" class="drag-list" :key="item.id">
                {{item.content}}
              </div>
            </transition-group>
          </draggable>
        </div>
        <div class="drag-box-item">
          <div class="item-title">done</div>
          <draggable v-model="done" @remove="removeHandle" :options="dragOptions">
            <transition-group tag="div" id="done" class="item-ul">
              <div v-for="item in done" class="drag-list" :key="item.id">
                {{item.content}}
              </div>
            </transition-group>
          </draggable>
        </div>
      </div>
    </div>
  </section>
</template>

<script>
    import draggable from 'vuedraggable'
    export default {
        name: 'draglist',
        data() {
            return {
                dragOptions:{
                    animation: 120,
                    scroll: true,
                    group: 'sortlist',
                    ghostClass: 'ghost-style'
                },
                todo: [
                    {
                        id: 1,
                        content: '开发图表组件'
                    },
                    {
                        id: 2,
                        content: '开发拖拽组件'
                    },
                    {
                        id: 3,
                        content: '开发权限测试组件'
                    }
                ],
                doing: [
                    {
                        id: 1,
                        content: '开发登录注册页面'
                    },
                    {
                        id: 2,
                        content: '开发头部组件'
                    },
                    {
                        id: 3,
                        content: '开发表格相关组件'
                    },
                    {
                        id: 4,
                        content: '开发表单相关组件'
                    }
                ],
                done:[
                    {
                        id: 1,
                        content: '初始化项目，生成工程目录，完成相关配置'
                    },
                    {
                        id: 2,
                        content: '开发项目整体框架'
                    }
                ]
            }
        },
        components:{
            draggable
        },
        methods: {
            removeHandle(event){
                console.log(event);
                this.$message.success(`从 ${event.from.id} 移动到 ${event.to.id} `);
            }
        }
    }
</script>

<style lang="less" scoped>
  .main{
    font-size: 16px;
  }
  .drag-box{
    display: flex;
    user-select: none;
  }
  .drag-box-item {
    flex: 1;
    max-width: 330px;
    min-width: 300px;
    background-color: #eff1f5;
    margin-right: 16px;
    border-radius: 6px;
    border: 1px #e1e4e8 solid;
  }
  .item-title{
    padding: 8px 8px 8px 12px;
    font-size: 14px;
    line-height: 1.5;
    color: #24292e;
    font-weight: 600;
  }
  .item-ul{
    padding: 0 8px 8px;
    height: 500px;
    overflow-y: scroll;
  }
  .item-ul::-webkit-scrollbar{
    width: 0;
  }
  .drag-list {
    border: 1px #e1e4e8 solid;
    padding: 10px;
    margin: 5px 0 10px;
    list-style: none;
    background-color: #fff;
    border-radius: 6px;
    cursor: pointer;
    -webkit-transition: border .3s ease-in;
    transition: border .3s ease-in;
  }
  .drag-list:hover {
    border: 1px solid #20a0ff;
  }
  .drag-title {
    font-weight: 400;
    line-height: 25px;
    margin: 10px 0;
    font-size: 22px;
    color: #1f2f3d;
  }
  .ghost-style{
    display: block;
    color: transparent;
    border-style: dashed
  }
</style>
